This is in regards to your query posted on the website CarDekho.com, we would like to inform you that Tata nano CX is powered by 0.6 liter petrol engine. Tata Nano gives mileage of 22 kmpl in city conditions and 26 kmpl on highways. Tata Nano Cx is equipped with Air-Conditioner. The next following variant of Tata Nano line up is Tata Nano Lx which has got Air-Conditioner, Power Windows and Power Steering.
You can use the given link to Compare Tata Nano Cx and Tata Nano Lx.
New Tata Nano with EasyShift is available at Rs. 2 lac (Ex-showroom, Delhi), and the final cost depends on the valuation of your car. So, first get the valuation of your car from authorized Tata dealer, so he can give you a final quote for the new car.